Artifact-resistant, power-efficient design of finger-ring plethysmographic sensors. I. Design and analysis

Rhee, Sokwoo; Yang, Boo-Ho; Asada, H. Harry

doi:10.1109/iembs.2000.901443

Cited by 19 publications

(16 citation statements)

References 1 publication

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“…The amplitude of the PPG signal obtained is also quite large as compared to the ECG signal and therefore gives better signal-to-noise ratio [4]. However, the technique is severely subject to motion artifacts and need to be taken care [5].…”

Section: Fig 1 Change In the Arterial Diameters With Each Heart Beatmentioning

confidence: 99%

Design and Development of Electro-Optical System for Acquisition of PPG Signals for the Assessment of Cardiovascular System

B.M¹

2014

IJRET

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The revolution in semiconductor technology has lead to the development of efficient optical techniques for acquisition of biomedical signals which can be used effectively in diagnostics. The interaction of light with biological tissue is complex and includes the optical processes like scattering, absorption, reflection, transmission and fluorescence. The amount of light received by the photo-detector varies in accordance with the blood volume, blood vessel wall movement and the orientation of red blood cells (RBC). In the present work a real-time electro-optical based photoplethysmograpgh system is developed to monitor and record the variations in the volume of blood with each heart beat resulting in the form of a signal called photoplethysmogram (PPG). The developed sensor unit consists of a source of light and photo-detector both packed in the form of probe and fitted to patient's index finger. The PPG signal acquired comprise a pulsatile (AC) waveform attributed to cardiac synchronous changes in the blood volume with each heart beat and is superimposed on a slowly varying (DC) baseline with various lower frequency components attributed to respiration, sympathetic nervous system activity and thermoregulation. For remote monitoring of PPG signals, a system is designed and developed based on

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Section: Fig 1 Change In the Arterial Diameters With Each Heart Beatmentioning

confidence: 99%

Design and Development of Electro-Optical System for Acquisition of PPG Signals for the Assessment of Cardiovascular System

B.M¹

2014

IJRET

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“…Signals were received and analyzed by a home computer. Rhee et al (2001) and Asada et al (2003) proposed several solutions to reduce noise due to an ambient light source and motion artifacts. A double ring design was developed to lower the influence of external force, acceleration and ambient light to minimize artifacts.…”

Section: Photoplethysmograph and Pulse Oximetermentioning

confidence: 99%

“…The inner ring holds the sensors units alone while the outer ring contains the other parts. This design alleviates the influence of external forces applied to the ring, and shields the sensor unit from ambient lighting (Rhee et al 2001). Other artifact reduction solutions were also investigated.…”

Section: Photoplethysmograph and Pulse Oximetermentioning

confidence: 99%

Reduction of Skin Stretch Induced Motion Artifacts in Electrocardiogram Monitoring Using Adaptive Filtering

Liu¹,

Pecht²

2006

2006 International Conference of the IEEE Engineering in Medicine and Biology Society

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Cardiovascular disease (CVD) is the leading cause of death in many regionsworldwide, accounting for nearly one third of global deaths in 2001. Wearable electrocardiographic cardiovascular monitoring devices have contributed to reduce CVD mortality and cost by enabling the diagnosis of conditions with infrequent symptoms, the timely detection of critical signs that can be precursor to sudden cardiac death, and the long-term assessment/monitoring of symptoms, risk factors, and the effects of therapy. However, the effectiveness of ambulatory electrocardiography to improve the treatment of CVD can be significantly impaired by motion artifacts which can cause misdiagnoses, inappropriate treatment decisions, and trigger false alarms. Skin stretch associated with patient motion is a main source of motion artifact in current ECG monitors. A promising approach to reduce motion artifact is the use of adaptive filtering that utilizes a measured reference input correlated with the motion artifact to extract noise from the ECG signal. Previous attempts to apply adaptive filtering to electrocardiography have employed either electrode deformation or acceleration, body acceleration, or skin/electrode impedance as a reference input, and were not successful at reducing motion artifacts in a consistent and reproducible manner. This has been essentially attributed to the lack of correlation between the reference input selected and the induced noise.In this study, motion artifacts are adaptively filtered by using skin strain as the reference signal. Skin strain is measured non-invasively using a light emitting diode (LED) and an optical sensor incorporated in an ECG electrode. The optical strain sensor is calibrated on animal skin samples and finally in-vivo, in terms of sensitivity and measurement range. Skin stretch induced artifacts are extracted in-vivo using adaptive filters. The system and method are tested for different individuals and under various types of ambulatory conditions with the noise reduction performance quantified.

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“…Technical focus areas within this domain include sensor miniaturization [1], wearable sensors [2], ultra low-power circuits [3], communication protocols [4], and network topologies. General rules related to, e.g., low power and reliability, guide each WBAN development phase.…”

Section: Introductionmentioning

confidence: 99%

High resolution wireless body area network with statistically synchronized sensor data for tracking pulse wave velocity

Warren

2012

2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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Artifact-resistant, power-efficient design of finger-ring plethysmographic sensors. I. Design and analysis

Cited by 19 publications

References 1 publication

Design and Development of Electro-Optical System for Acquisition of PPG Signals for the Assessment of Cardiovascular System

Design and Development of Electro-Optical System for Acquisition of PPG Signals for the Assessment of Cardiovascular System

Reduction of Skin Stretch Induced Motion Artifacts in Electrocardiogram Monitoring Using Adaptive Filtering

High resolution wireless body area network with statistically synchronized sensor data for tracking pulse wave velocity

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